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Finding the Fourth Proportional to 18,708.80, 27,998.40 and 17,153.60

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Solution

The fourth proportional to 18,708.80, 27,998.40 and 17,153.60 is: 25,670.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.80 : 27,998.40 = 17,153.60 : x
  2. Step 2: Convert to fraction form
    18,708.80/27,998.40 = 17,153.60/x
  3. Step 3: Cross multiply
    18,708.80x = 27,998.40 × 17,153.60
  4. Step 4: Simplify right side
    18,708.80x = 480,273,354.24
  5. Step 5: Solve for x
    x = 480,273,354.24/18,708.80
  6. Step 6: Final answer
    x = 25,670.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.